CDL · Doubles and triples
When hooking a converter dolly to the second or third trailer, how can you tell that the trailer is at the right height?
Correct answer: Backing the dolly beneath it raises the trailer a little.
Answer options
- AThe kingpin's center is aligned with the locking jaws
- BBacking the dolly beneath it raises the trailer a little Correct
- CThe kingpin is resting on top of the fifth wheel
Why
The trailer should sit just below the center of the dolly's fifth wheel, so the fifth wheel lifts it a little as the dolly slides under; if the trailer is too high, it may not couple correctly.
About this question
Topic: Doubles and triples License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Coupling Doubles and Converter Dollies (28 questions). Take the full set and check your score.
Practice Coupling Doubles and Converter DolliesMore questions from Coupling Doubles and Converter Dollies
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